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Leases - Operating lease reconciliation (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jan. 01, 2019
Reconciliation of future undiscounted cash flows to the operating lease liabilities and the related ROU assets
2019 (Excluding the six months ended June 30, 2019)	$ 26
2020	42
2021	32
2022	24
2023	18
Thereafter	35
Total future lease payments	177
Less imputed interest	25
Present value of future lease payments	152
Less current lease liabilities	41
Non-current operating lease liabilities	111
Operating lease assets	$ 143
ASU 2016-02, Leases | Adjustment
Reconciliation of future undiscounted cash flows to the operating lease liabilities and the related ROU assets
Present value of future lease payments		$ 170
Operating lease assets		$ 161

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- Definition

Amount of lessee's undiscounted obligation for lease payments for operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
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Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth fiscal year following latest fiscal year.

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+ References

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