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Impairment of Assets Held for Sale

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Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Estimated period for the anticipated transfer of gain (loss), net, from accumulated other comprehensive income into earnings, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) shares in Millions		3 Months Ended	12 Months Ended
	Oct. 13, 2015	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2015
Summary of Significant Accounting Policies (Textuals) [Abstract]
Cash and cash equivalents			$ 703,000,000	$ 665,000,000	$ 683,000,000	$ 682,000,000
Fair value of long-term debt			140,000,000	156,000,000
Asset impairments			95,000,000	$ 0	$ 0
Goodwill, impairment loss			$ 25,000,000
Senior notes	$ 4,500,000,000
Purchase of common shares (in shares)			1	4	3
Buildings
Summary of Significant Accounting Policies (Textuals) [Abstract]
Fixed asset, estimated useful life			30 years
Minimum \| Furniture and fixture
Summary of Significant Accounting Policies (Textuals) [Abstract]
Fixed asset, estimated useful life			3 years
Minimum \| Computer equipment
Summary of Significant Accounting Policies (Textuals) [Abstract]
Fixed asset, estimated useful life			3 years
Maximum \| Furniture and fixture
Summary of Significant Accounting Policies (Textuals) [Abstract]
Fixed asset, estimated useful life			7 years
Maximum \| Computer equipment
Summary of Significant Accounting Policies (Textuals) [Abstract]
Fixed asset, estimated useful life			7 years
Customer relationships
Summary of Significant Accounting Policies (Textuals) [Abstract]
Intangible assets, estimated useful lives			10 years
Trademarks \| Maximum
Summary of Significant Accounting Policies (Textuals) [Abstract]
Intangible assets, estimated useful lives			5 years
Computer software \| Minimum
Summary of Significant Accounting Policies (Textuals) [Abstract]
Intangible assets, estimated useful lives			3 years
Computer software \| Maximum
Summary of Significant Accounting Policies (Textuals) [Abstract]
Intangible assets, estimated useful lives			10 years
Internally developed software \| Minimum
Summary of Significant Accounting Policies (Textuals) [Abstract]
Intangible assets, estimated useful lives			3 years
Internally developed software \| Maximum
Summary of Significant Accounting Policies (Textuals) [Abstract]
Intangible assets, estimated useful lives			10 years
Treasury lock hedge \| Cash Flow Hedge
Summary of Significant Accounting Policies (Textuals) [Abstract]
Derivative, notional amount							$ 1,000,000,000.0
Settlement of derivative contract	$ 16,000,000
Interest expense recognition period	10 years
Disposal Group, Held-for-sale, Not Discontinued Operations \| Brazilian Venture
Summary of Significant Accounting Policies (Textuals) [Abstract]
Asset impairments		$ 95,000,000
Impairment of intangible assets		42,000,000
Goodwill, impairment loss		25,000,000
Impairment of assets held for sale		$ 28,000,000
Foreign Entities
Summary of Significant Accounting Policies (Textuals) [Abstract]
Cash and cash equivalents			$ 340,000,000