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Long-term Commitments (Operating Lease Agreements) (Details) $ in Millions | Dec. 31, 2017 USD ($)
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Gross Rental Commitments |
2018, Gross Rental Commitments | $ 355
2019, Gross Rental Commitments | 316
2020, Gross Rental Commitments | 291
2021, Gross Rental Commitments | 226
2022, Gross Rental Commitments | 207
Subsequent years, Gross Rental Commitments | 773
Rental from Subleases |
2018, Rentals from Subleases | 41
2019, Rentals from Subleases | 34
2020, Rentals from Subleases | 31
2021, Rentals from Subleases | 3
2022, Rentals from Subleases | 1
Subsequent years, Rentals from Subleases | 1
Net Rental Commitments |
2018, Net Rental Commitments | 314
2019, Net Rental Commitments | 282
2020, Net Rental Commitments | 260
2021, Net Rental Commitments | 223
2022, Net Rental Commitments | 206
Subsequent years, Net Rental Commitments | $ 772

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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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