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Leases - Supplemental Cash Flow (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Cash used in operating activities:
Operating leases	$ 9
Finance leases	4
Cash used in financing activities:
Finance leases	1
ROU assets recognized in exchange for lease obligations:
Operating leases	94
Finance leases	$ 241

X

- Definition

Right-of-Use Asset Obtained in Exchange for Operating Lease Liability [Abstract]

+ References

No definition available.

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X

- Definition

Amount of interest paid on finance lease liability.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
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X

- 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

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- Definition

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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