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Commitments and Contingencies Leases (Notes) | 12 Months Ended
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Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract] |
Leases of Lessee Disclosure [Text Block] | Lease Commitments We have entered into various non-cancellable operating lease agreements for certain of our offices and facilities throughout the world with original lease periods expiring primarily between 2018 and 2024. Some of these agreements have escalating rent payment provisions. We recognize rent expense under such agreements on a straight-line basis. Our rent expense under operating leases was $7.9 million in 2017, $0.6 million in 2016 and $0.4 million in 2015. As of December 31, 2017, future minimum lease payments under our non-cancelable operating leases are as follows over each of the next five years and thereafter (in millions):
2018 |  | $ | 8,775 |
2019 |  | 5,907 |
2020 |  | 4,059 |
2021 |  | 3,214 |
2022 |  | 3,105 |
Thereafter |  | 6,446 |
Total |  | $ | 31,506 |

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- Definition The entire disclosure for lessee entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -URI http://asc.fasb.org/topic&trid=2208923 + Details
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