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Leases - Additional Information Related to Leases (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities: |
Operating cash flows from operating leases | $ 166
Operating cash flows from finance leases | 12
Financing cash flows from finance leases | 29
Right-of-use assets obtained in exchange for lease liabilities: |
Operating leases | 95
Finance leases | $ 4
Weighted-average remaining lease term: |
Operating leases | 10 years 9 months 18 days
Finance leases | 5 years 4 months 24 days
Weighted-average discount rate: |
Operating leases | 4.00%
Finance leases | 9.00%

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- Definition Amount of interest paid on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977 + Details
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- Definition Amount of cash outflow for principal payment on finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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