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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2019
Accounting Policies [Abstract] |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles | Recently Adopted Accounting Pronouncements
Standard/Description | Effective Date and Adoption Considerations | Effect on Financial Statements
ASU No. 2016-02, Leases. Entities are required to recognize both assets and liabilities arising from finance and operating leases, along with additional qualitative and quantitative disclosures. | We adopted ASU No. 2016-02 on January 1, 2019. | Further disclosures and details on our adoption of ASU 2016-02 are discussed below.
Accounting Pronouncements Not Yet Adopted
Standard/Description | Effective Date and Adoption Considerations | Effect on Financial Statements
ASU No. 2016-13, Financial Instruments - Measurement of Credit Losses on Financial Instruments. Applies to all financial instruments carried at amortized cost including held-to-maturity debt securities and trade receivables. Requires financial assets carried at amortized cost to be presented at the net amount expected to be collected and requires entities to record credit losses through an allowance for credit losses on available-for-sale debt securities. | Effective at the beginning of our first quarter of fiscal year 2020, with early adoption permitted. We do not expect to early-adopt. | We are currently evaluating this guidance to determine its impact on our consolidated financial statements, and based on our preliminary assessment, we do not expect the impact of adoption of this guidance to be material.
Operating Lease Balance Sheet Details | Details of our lease asset and liability balances are as follows (in millions):
|  | As of September 30, 2019 |  | As of January 1, 2019
Right-of-use lease assets |  | $292 |  | $308
Current operating lease liability |  | 52 |  |  | 52 |
Non-current operating lease liability |  | 287 |  |  | 305 |
Total operating lease liability |  | $339 |  | $357
Recognition of Operating Lease Liabilities | As of September 30, 2019, we estimate that our operating lease liability will be recognized in the following years (in millions):
Remainder of 2019 | $ | 14 |
2020 | 64 |
2021 | 63 |
2022 | 61 |
2023 | 44 |
Thereafter | 137 |
Lease liability amounts repayable | 383 |
Interest costs | 44 |
Total operating lease liability | $ | 339 |
Supplemental Cash Flow Information and Non-Cash Activity Related to Operating Leases | Supplemental cash flow information and non-cash activity related to our operating leases are as follows:
| Nine Months Ended September 30, 2019 |  | Three Months Ended September 30, 2019
Cash paid for amounts included in the measurement of operating lease liability | $ | 46 |  |  | $ | 15 |
Right-of-use assets obtained in exchange for operating lease obligations | $ | 381 |  |  | $ | 2 |

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 + Details
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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=116846552&loc=d3e765-108305 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(b)(6)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=116846552&loc=d3e725-108305 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794 + Details
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