Goodwill and Intangible Assets (Sensitivity Analysis) (Details) - Domestic and International Logistics reporting unit	Sep. 30, 2019
Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value sensitivity analysis of 50 bps adverse change (percent)	(3.60%)
Fair value sensitivity analysis of 50 bps favorable change (percent)	2.60%
Growth Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value sensitivity analysis of 50 bps adverse change (percent)	1.00%
Fair value sensitivity analysis of 50 bps favorable change (percent)	(2.60%)