Revenue Accounting for Contracts and Adoption of ASC Topic 606 Revenue Accounting for Contracts and Adoption of ASC Topic 606 - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 29, 2019	Mar. 30, 2018	Mar. 29, 2019	Mar. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 3,091,596	$ 2,870,295	$ 6,175,384	$ 4,654,294
United States
Disaggregation of Revenue [Line Items]
Revenues	2,161,334	1,919,599	4,343,638	3,038,432
Europe
Disaggregation of Revenue [Line Items]
Revenues	600,903	623,397	1,215,127	1,087,492
Canada
Disaggregation of Revenue [Line Items]
Revenues	50,021	52,651	100,509	59,555
Asia
Disaggregation of Revenue [Line Items]
Revenues	43,765	42,194	79,376	74,458
India
Disaggregation of Revenue [Line Items]
Revenues	18,364	15,711	31,002	25,358
Australia and New Zealand
Disaggregation of Revenue [Line Items]
Revenues	123,235	149,830	249,883	290,708
South America and Mexico
Disaggregation of Revenue [Line Items]
Revenues	3,370	5,187	6,020	6,960
Middle East and Africa
Disaggregation of Revenue [Line Items]
Revenues	$ 90,604	$ 61,726	$ 149,829	$ 71,331