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Contingencies and commitments (Tables) | 12 Months Ended
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Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract] |
Minimum future rental commitments under non-cancelable operating leases | The following table summarizes the minimum future rental commitments under noncancelable operating leases as of December 31, 2017 (in millions):
| Amount
2018 | $ | 158 |
2019 | 126 |
2020 | 116 |
2021 | 100 |
2022 | 59 |
Thereafter | 91 |
Total minimum operating lease commitments | $ | 650 |
U.S. repatriation tax commitments | Under the 2017 Tax Act, we will elect to pay the repatriation tax primarily related to our prior indefinitely invested earnings of our foreign operations in eight annual installments beginning in April 2018. See Note 5, Income taxes. As of December 31, 2017, we expect to pay $7.3 billion in repatriation taxes during the following years (in millions):
| Amount
2018 | $ | 585 |
2019 | 585 |
2020 | 585 |
2021 | 585 |
2022 | 585 |
Thereafter | 4,391 |
Total U.S. repatriation tax commitments | $ | 7,316 |

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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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