Leases - Cash Flow Information (Details) $ in Millions	9 Months Ended
Sep. 30, 2019 USD ($)
Cash Paid for Amounts Included in the Measurement of Lease Liabilities
Operating Cash Flows, Operating Leases	$ 50
Operating Cash Flows, Finance Leases	9
Investing Cash Flows, Operating Leases	27
Financing Cash Flows, Finance Leases	31
ROU Assets Obtained in Exchange for Lease Liability, Operating	93
ROU Assets Obtained in Exchange for Lease Liability, Finance	$ 15

Cash Flow, Lessee [Abstract]

No definition available.

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- Definition

Amount of interest paid on finance lease liability.

+ References

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-Publisher FASB
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-SubTopic 20
-Section 50
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+ Details

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- Definition

Amount of cash outflow for principal payment on finance lease.

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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

+ References

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- Definition

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

+ References

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