Revenues	3 Months Ended
Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer	Revenues Effective January 1, 2018, the Company adopted Topic 606 Revenue from Contracts with Customers (Topic 606). The adoption of Topic 606 did not materially impact the Company's revenue recognition policy. The Company adopted the standard using the modified retrospective transition method applied to those contracts not completed as of January 1, 2018, resulting in a $22 million adjustment to the opening balance of retained earnings and the recording of deferred contract costs and contract liabilities of $135 million and $165 million, respectively. The Company satisfied nearly all performance obligations for the contract liabilities recorded upon adoption at January 1, 2018 and recognized the corresponding revenues and costs during the first quarter. In conjunction with the adoption of Topic 606, the Company also changed its presentation of certain warehouse and distribution revenues from a net to a gross basis, which increased customs brokerage and other services revenues and operating expenses by approximately $50 million in the first quarter of 2018. Comparative prior year information has not been adjusted and continues to be reported under the Company's historical revenue recognition policies described in Note 1.E to the Company's Form 10-K as filed on February 23, 2018. The Company disaggregates its revenues by its three primary service categories in the consolidated financial statements: airfreight, ocean freight and ocean services and customs brokerage and other. Revenues by geographic location are presented within business segment information in Note 9.

Revenues

Effective January 1, 2018, the Company adopted Topic 606 Revenue from Contracts with Customers (Topic 606). The adoption of Topic 606 did not materially impact the Company's revenue recognition policy. The Company adopted the standard using the modified retrospective transition method applied to those contracts not completed as of January 1, 2018, resulting in a $22 million adjustment to the opening balance of retained earnings and the recording of deferred contract costs and contract liabilities of $135 million and $165 million, respectively. The Company satisfied nearly all performance obligations for the contract liabilities recorded upon adoption at January 1, 2018 and recognized the corresponding revenues and costs during the first quarter. In conjunction with the adoption of Topic 606, the Company also changed its presentation of certain warehouse and distribution revenues from a net to a gross basis, which increased customs brokerage and other services revenues and operating expenses by approximately $50 million in the first quarter of 2018.

Comparative prior year information has not been adjusted and continues to be reported under the Company's historical revenue recognition policies described in Note 1.E to the Company's Form 10-K as filed on February 23, 2018.

The Company disaggregates its revenues by its three primary service categories in the consolidated financial statements: airfreight, ocean freight and ocean services and customs brokerage and other. Revenues by geographic location are presented within business segment information in Note 9.