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Defined contribution plan	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Defined contribution plan	Defined contribution plan The Company has defined contribution plans to which employees of the Company and participating subsidiaries may defer compensation for income tax purposes. Participants are eligible to receive matching contributions based on their contributions, in addition to other Company contributions. Defined contribution plan expenses were $173 million, $196 million and $174 million for the years ended December 31, 2018, 2017 and 2016, respectively.

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- References

No definition available.

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- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

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