Long-Term Debt (Other Debt Narrative) (Details) $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($) agreement	Mar. 31, 2019 USD ($)
Debt Instrument [Line Items]
Interest paid on borrowings	$ 264	$ 189
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Number of interest rate swaps \| agreement	1
Aggregate notional amount	$ 300
Interest Rate Swap, Currently Effective [Member]
Debt Instrument [Line Items]
Aggregate notional amount	300
ABL Facility [Member]
Debt Instrument [Line Items]
Debt instrument available borrowing base	769
Outstanding borrowings	380
ABL Facility [Member] \| ABL Facility Customary Covenants [Member]
Debt Instrument [Line Items]
Debt instrument available borrowing base	$ 95
Debt instrument variable interest rate	10.00%
ABL Facility [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 150

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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+ References

No definition available.

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- Definition

Nominal or face amount used to calculate payments on the derivative liability.

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The number of derivative instruments of a particular derivative liability or group of derivative liabilities held by the entity.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

+ References

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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