Leases - Cash Flow Information (Details) $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($)
Operating Leases
Operating Cash Flows	$ 74
Investing Cash Flows	36
Finance Leases
Operating Cash Flows	12
Financing Cash Flows	42
ROU Assets Obtained in Exchange for Lease Liabilities
Operating Leases	127
Finance Leases	$ 26

Cash Flow, Finance Lease, Lessee [Abstract]

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- Definition

Cash Flow, Operating Lease, Lessee [Abstract]

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- Definition

Right-Of-Use Asset Obtained In Exchange For Lease Liability [Abstract]

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- Definition

Amount of interest paid on finance lease liability.

+ References

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- Definition

Amount of cash outflow for principal payment on finance lease.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Amount of cash outflow from operating lease to bring another asset to condition and location necessary for its intended use.

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Amount of increase in right-of-use asset obtained in exchange for finance lease liability.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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