Consolidated Condensed Statements of Equity (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2019	Jun. 30, 2018
Statement of Stockholders' Equity [Abstract]
Remaining authorized repurchase amount	$ 3,100
Stock repurchase program, authorized amount		$ 8,000
Stock repurchase program, amount paid for shares expected to be repurchased	$ 700

Stock Repurchase Program, Amount Paid, Shares Expected To Be Repurchased

No definition available.

Name:	lly_StockRepurchaseProgramAmountPaidSharesExpectedToBeRepurchased
Namespace Prefix:	lly_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant