2101100 - Disclosure - Accounting Policies and Interim Results
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2111100 - Disclosure - Accounting Pronouncements
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2103100 - Disclosure - Accounts Receivable, Net
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2107100 - Disclosure - Commitments and Contingencies
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2110100 - Disclosure - Comprehensive Income
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1002000 - Statement - Consolidated Balance Sheets (Unaudited)
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1002500 - Statement - Consolidated Balance Sheets (Unaudited) (Parenthetical)
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1003000 - Statement - Consolidated Statements of Cash Flows (Unaudited)
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1004000 - Statement - Consolidated Statements of Changes in Equity (Unaudited)
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1004500 - Statement - Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical)
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1001000 - Statement - Consolidated Statements of Income (Unaudited)
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2106100 - Disclosure - Debt
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0001000 - Document - Document and Entity Information
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2108100 - Disclosure - Employment Benefit Plans
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2102100 - Disclosure - Fuel
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2105100 - Disclosure - Other Assets
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2104100 - Disclosure - Other Intangible Assets and Liabilities
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2109100 - Disclosure - Related Party Transactions
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