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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2019
Accounting Policies [Abstract] |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles | The following table summarizes our minimum commitments under noncancelable operating leases having initial terms in excess of one year, primarily for property, at December 31, 2018 as disclosed in our 2018 Form 10-K:
| Years Ending December 31,
| 2019 |  | 2020 |  | 2021 |  | 2022 |  | 2023 |  | Thereafter |  | Total
Minimum commitments(a) | $ | 296 |  |  | $ | 286 |  |  | $ | 247 |  |  | $ | 180 |  |  | $ | 146 |  |  | $ | 582 |  |  | $ | 1,737 |
Sublease income | (61 | ) |  | (51 | ) |  | (44 | ) |  | (38 | ) |  | (33 | ) |  | (129 | ) |  | (356 | )
Net minimum commitments | $ | 235 |  |  | $ | 235 |  |  | $ | 203 |  |  | $ | 142 |  |  | $ | 113 |  |  | $ | 453 |  |  | $ | 1,381 |
_________ (a) Certain leases contain escalation clauses and renewal or purchase options.

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